I would suggest go for

ASP .61 ABC Series 3

SPECIFICATIONS:

Engine Type: 2-Stroke
Displacement: 0.610 cu. in.
Cylinders: 1

General Specs:
- 1 cylinder
- Displacement: 0.610 cubic inches
- Bore: 0.945 (in.)
- Stroke In: 0.866 (in.)
- Low RPM: 2000
- High RPM: 18000
- 1.750 bhp @ 15000 RPM
- Weight (no muffler): 21.56 oz.


Applications:
- Competition Airplanes
- Pattern/Aerobatics
- Scale
- Standard Airplane
- Sport

Street Price:
$104.00

Have a good day and safe flying

Mody